Koutetsu Type 3 AS Santoku

Regular price £185.00

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Koutetsu Type 3 AS Santoku Purchase options

Outstandingly sharp and with a subtle beauty this is a fantastic every day knife that's starting to become a bit of a collectors piece due to the difficulty of finding supply and we can see why it's so popular.

First Impressions

Top marks - So sharp out of the box, light, and will fly through any amount of prep work you can throw at it.


These knives have a beautiful shape, very simple and stylish with no decoration beyond the engraved kanji on the brushed finish. You'll love these if you like understated beauty.

In Hand

The lightweight blade and comfortable traditional octagonal wa handle work well as you'd expect but it's also nice to see a real level of care and attention taken to round off the edges along the spine and around the heel of the knife. 

Often that's something that's not always done on Japanese knives but it's little touches like this that elevate the Kotetsu knives and makes them so highly coveted.


The super blue core hardened to approximately 63-64 is going to provide a durable and robust edge and while the extremely thin grind and hardness will mean you might need to ensure your cutting technique is precise, this is a blade that with care and normal maintenance is designed and expected to last many years.

Ease of Care

As long as you follow the normal care instructions for Japanese knives you can expect this knife to serve you for many years. 

We would recommend using a drop or two of camellia oil periodically to help protect the carbon steel core.

Our Verdict

The high quality blade and handle perform well and combined look the part without breaking the bank. If you're looking for performance at a very reasonable price then the AS is for you.

Over the last few years, knives from the Koutetsu ranges have become quite collectable due to the scarcity of the supply and its excellent performance and price point.

Product Quick View

Want to see a little more of the knife? Check out what the knife looks like in hand and up close.

Product details

  • Blade Length: 168mm (Measurement of the cutting edge)
  • Total Length: 306mm (Blade + Handle)
  • Blade Thickness: 2.29mm (Measured level with heel)
  • Blade Height: 46.7mm (Heel to spine)
  • Total Weight: 132 grams
  • Core Steel: Super Blue Steel
  • This knife is made from a reactive carbon steel which is not stainless and therefore has some special care instructions and properties.

    Read the carbon steel care guide
  • Cladding Steel: Stainless
  • Hardness: 63-64 (HRC)
  • Handle Style: Japanese
  • Handle Material: Octagonal rosewood

Product SKU: 1952

Our aim is to measure and photograph all our products as accurately as possible but due to the handmade nature of many items, please be aware that there may be some variance in the measurements and that things such as blade and knife handle patterns can vary and presentation boxes may differ from those shown but we will always endeavour to provide the most accurate measurements, photos and descriptions of our products.

Some measurements such as HRC are provided by the manufacturer and should therefore be used as a guide.

Protection & care for this knife

Blacksmith Profile

Takayuki Shibata

Shibata san is one of the top knife sharpeners in Japan and his ranges are famed for the quality of sharpness and finish.

View all knives from Koutetsu

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Helping you find the perfect knives & accessories

Cutting Edge Knives is a family run business established in 2011 and based in the picturesque town of Holmfirth, West Yorkshire. We love the history and craftsmanship that goes into making Japanese chef knives and accessories and the excitement and enjoyment you experience when using a truly sharp knife in the kitchen.

Over many years we've helped thousands of happy customers find their dream knife and look forward to helping you too.

Ally & James

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